<div>
Remove the loop, check out the &quot;WaitCommEvent&quot; function<br />
in the Win32 Help/documentation.<br />
<br />
You can have the OS &quot;wake your progam&quot; whenever something<br />
interesting happens at the COMM port.<br />

</div>


Remove the loop, check out the "WaitCommEvent" function
in the Win32 Help/documentation.

You can have the OS "wake your progam" whenever something
interesting happens at the COMM port.


<div>
<div class="content wysiwyg-content">
Hi All,<br />
<br />
I've got a big problem. I wrote a service under WINNT which &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br />
asks the SERIAL Port, and put the characters into a file.<br />
The problem is, I don't know when is data in the input buffer. My program contains a loop which never ends and the CP usage is nearly 100%. As far as I know, the sender sends a signal which indicates that the data is valid. How can I mask it?<br />
Is there any solution?<br />
<br />
Thanks in advance<br />
<br />
ANdrew
</div>
</div>


Hi All,

I've got a big problem. I wrote a service under WINNT which	
asks the SERIAL Port, and put the characters into a file.
The problem is, I don't know when is data in the input buffer. My program contains a loop which never ends and the CP usage is nearly 100%. As far as I know, the sender sends a signal which indicates that the data is valid. How can I mask it?
Is there any solution?

Thanks in advance

ANdrew

Handling COM port under NT service

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